diff --git a/dataflow_neuro/cell_lib_std.act b/dataflow_neuro/cell_lib_std.act
index 39ec826..397ee99 100644
--- a/dataflow_neuro/cell_lib_std.act
+++ b/dataflow_neuro/cell_lib_std.act
@@ -94,7 +94,19 @@ namespace tmpl {
     {
       sizing { _y {-4,2}; y {-8,4} }
     }
-        export defcell BUF_X12<: buf()
+    export defcell BUF_X12<: buf()
+    {
+      sizing { _y {-6,2}; y {-12,4} }
+    }
+    export defcell BUF_X16<: buf()
+    {
+      sizing { _y {-6,2}; y {-12,4} }
+    }
+    export defcell BUF_X24<: buf()
+    {
+      sizing { _y {-6,2}; y {-12,4} }
+    }
+    export defcell BUF_X32<: buf()
     {
       sizing { _y {-6,2}; y {-12,4} }
     }